Testing Post-Tensioned Steel Trunnion Rods for the U. S. Army ...

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Results – <strong>Trunnion</strong> PrototypeLarge increases infrequency at lowloads60FrequencyAbove ~20,000 lbpattern of slow butsteady increase infrequency withtensionFrequency (Hz)504030204847.5104750000 70000 90000 11000000 20000 40000 60000Load (lb)80000 100000 120000
Results – <strong>Trunnion</strong> PrototypeMany tests done at different lengths and loads3000.02500.0Fully Loaded350300Response (Hz)2000.01500.01000.0500.0Lower Loads25020015010050Lower Loads0.000 1 2 3 4 25 26 27 28 29 30 31Length (in)
Page 1 and 2: Testing Post-Tensioned Steel Trunni
Page 3 and 4: The Problem• Some Catastrophic Ro
Page 5 and 6: Background on the Testing Method•
Page 7 and 8: The Nondestructive Field Testing“
Page 9 and 10: Accessibility Issues
Page 11 and 12: Tackling AccessibilityEach rod had
Page 13 and 14: Allows for modeling ofmany damconfi
Page 15 and 16: DWP Response with TensionRobert F.
Page 17 and 18: DTE Results - West Point, GA+ 8.6 k
Page 19 and 20: Greenup, KY104 rods testedIdentifie
Page 21 and 22: Thank You !
Page 23 and 24: Greenup ResultsMost rods ~50 Hz10 3
Page 25: Trunnion Assembly ResultsRod typica
Page 29 and 30: Liftoff Tests Results• West Point
Page 31 and 32: Length (in)R. F. Henry DataResponse
Page 33 and 34: FDH Approach to Trunnion Rods• No
Page 35 and 36: Current Approach• Measure all rod
Page 37: Thank you
Page 44: Greenup Rods• Grip nut integralwi
Page 47 and 48: Slipped Grip Nuts at R. F. Henry•
Page 49 and 50: West Point Dam
Page 51 and 52: Greenup, KY Dam
Page 53 and 54: R. F. Henry Trunnion Rods21 rods pe
Page 55 and 56: Lift-Off TestsOn site practice lift
Page 57 and 58: • Rods also tested by“Listening
Page 59 and 60: West Point ResultsCollectedaccelera
Page 61 and 62: R. F. Henry DamR. F. Henry rods hav
Page 63 and 64: Greenup Trunnion Rods52 rods per gr
Page 65 and 66: West Point ResultsObserved response
Page 67: Trunnion Anchor Rod AssemblyTransfe

Testing Post-Tensioned Steel Trunnion Rods for the U. S. Army ...

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